Camera: Remove AF UI when faces are detected in photo ui

 AF window does not go away when faces are detected while
 capturing the images.This is because AF is not cleared
 when faces are detected in photo ui.

 The fix is to clear AF window by calling AF succeed
 when faces are detected in photo ui.

 CRs-Fixed: 555139

Change-Id: If0f10296a8fa232829e80a07778f78f158a55bf5